Mary McCormack gained widespread recognition starring as Justine Appleton on the acclaimed series ‘Murder One’ (19951997), establishing herself as a versatile talent across film, television, and stage. Early in her career, McCormack performed in Gian Carlo Menotti’s Christmas opera, ‘Amahl and the Night Visitors,’ and cultivated her craft in New York theaters, including The Atlantic Theatre Company, Alice’s 4th Floor, and Naked Angels, where she appeared in Jon Robin Baitz’s ‘A Fair Country.’ Her early filmography includes roles in ‘Private Parts’ (1997), the blockbuster ‘Deep Impact’ (1998), ‘True Crime’ (1999), ‘Mystery, Alaska’ (1999), and ‘K-PAX’ (2001), showcasing her range in both dramatic and comedic roles. A significant career milestone came when McCormack joined the cast of the Emmy Award-winning series ‘The West Wing’ as Kate Harper, a role she held from 2004 to 2006. She then took on the lead role of Deputy U.S.
She continued her prolific television career starring as Peggy Cleary in the ABC sitcom ‘The Kids Are Alright’ (20182019), earning praise for her comedic timing. Following this, she took on the role of Willie Day in the Starz drama ‘Heels’ (20212023), delivering a compelling performance in the series spanning multiple seasons. McCormack continues to build on her impressive body of work, with an anticipated role as Mother in the upcoming series ‘Vicious,’ slated for release in 2025. Her consistent contributions as an actress and producer, marked by critical acclaim and versatile performances across diverse genres and platforms, underscore her enduring appeal and significant impact in the entertainment industry.